#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2018 crane <crane@crane-pc>
#
# Distributed under terms of the MIT license.

"""

"""

def double_sigma():
    x_max = 10
    y_max = 20
    s = 0
    for x in range(2, x_max):
        for y in range(2, y_max):
            s += x*y

    print(s)
    sx = sum(range(2, x_max))
    sy = sum(range(2, y_max))
    print( sx* sy)


def main():
    print("start main")
    double_sigma()

if __name__ == "__main__":
    main()
